Method and apparatus for treating sewage



y. liquidjwill rise upwardylin the'well tother height ofthefliquid inthe'fcanal.` 'tAt its upper lendthe i outer walls 11 and 16.A,nlterbedisof annui 1 lar form in agreement with thejform of!theca'nalyandffextends entirely laround the same sokthatwalllj 4Aliquidfy passingoveri the jfwall 11' "must ,cijescendv through the filter kbedfprior 'tothe time ',itjmovesv n through the opening `18 vandthence upwardly AsoVadaptedftp` fbev` attracted by an, lectromagnetg" basin structurecfrompoints y at`. the exterior face f of the outer wall 16, .At apointinglinewithfthe center ofthe sump`15, thefbridge supportsafixed Vbearing 31 in which va shaft 32 is mounted atits fupperendffportion,the/lowerV end of thisshaft` I terl"v Themeansv-bylwhichfthe carriage isthusl 1 mounted upon said shaftincludesra bearing 35;

`on'the carriage and a. collar 36; secured rigidly to 4rior of thisbasin is divided by an annular wall 11 into a relatively largeclarication chamber12 chargeA conduit I9. A 'vertically'adjustableovefr-l t' present enlbodirnent,y lthe means disclosed:v forvertically vadjusting theoveriiow gate comprises a4 Qpedsta121arrangedupon; a plattorrxr.22,"1aLt`tl1e` '.top of the Welland v'inicthispedestal is'arran'ged" l a verticauymovamc shaft 23; the cpcratiqn'or' igate so that through the operation of the lian'dwheelin one`directiontl'ie gate willbe moved f upwardly, whereas ,uponthej operationi `of ,the

is mounted Afor Vits `support upon' suitable ledges gate20.f Inthe.presentsinstance, the filterbed'i ilcomprises,ascreenz'lwhich isdisposed upon the;r 5514V x structurel-which 1 extends diametrically'across "the r-trally inthe sumpf A .travelingfcarriage or struc-`A q anynumber of units may be employed as this shaft and upon the top of thecollar. 3'! denotes will not affect the principle of the invention. abaflieftube `which surrounds the shaft 32- and t' Referring now to thedrawings, it will be noted depends from the carriage so as to turntherethat the jinvention is.,disclosed;asecomprising a ywith. .-,Thependant baille tube :extends downcircular or cylindrical 4basin v10which may be built 4VWaljdlyf,into the `basirrwith` its open 'lower cend y of concrete or any suitable material. The intedisposed 4aconsiderable distance below the sur- 'face of liquidcwhich overflows thewall 11 into the lcanal.l The raw sewage liquid is admitted 'throughasupply pipe 38 into the interiorI of the baflie'tube, the delivery end38' of this supply pipe being bent upwardly as shown in Figs. 1 and4,-so i thajtitheesewage liquid Ywill enter the interior of the tubewhile flowing in an upward direction.` Byf-thisDrovisionthe admittedsewage liquid is required Yto pass `downwardly 'through the open end ofthe tube so that it will rspread through the body, of the liquidcontents of the basinwithout creatingv undesirable ,agitation anddisturbance in they -bodyof the liquid and more particularly at` or nearthefsurface thereof where it is desired to have aisxnooth,l gentlevfiowin ai direction overy 'the 'overow wall 1-1; In. thisnconnection',it.will readily appearthatthe barile tube performslin effect' the serviceof a waterheadfor causing thev liquid to rise in thesb'asinfexteiorly`of y`the-tube and hence inducingvv the tidalow over the over-` `iiowvwall; and furthergkwhenfthefcanal hasbeen lledfwith liquid tocausefupward imovement --through the well for discharge over'ither gate 20.

)At this xpoint 'itmay be remarked that withinA the basin;I the sewage'liquid may? be subjected to anysuitable,'known or approved process oftreatyment 'adapted tolgathe'r, collect or coagulatefthe "colloidalandsuspended matter. so that this sludge materialgfhaving ya higher:specific gravity than; Ithe Waterjwill settle downwardly to the bottomi of the basin while thelighterwaterandparticles willrise to pass overthe overflow wall. `,An eilicient process for "causing f the.`relatively heavy hand-wheel in c. reverse direction the gate wurmatfertf? Subsideupon the botiomofihe basil be moved,downw,Eu-diyl t' ff v- 'f isL described in'U; S.v lLetters yPatent Naz-1,817,623 The mmmwhich "p-a's'sesf o datedv September13,l 1932 grantedv to, William'(Il.l i Laughlin." Through'theprovisionofthe'supply and @baille tubearrangementhereiny disclosed, it 'will be recognized ,that.thchcavymaacrcffsclidsn kvin theraw sewage; becauseof theirdissemination y Y throughthev basin; contents vfrom a c'entral pointbelow the'bafiie tube;fwill be 'given an opportunity "tosubsidejto thebottom ofthe-basin witha min' mum `of; disturbance" tof the upward 'riseof the lighter liquids and particles' to; the llevel for passifngovertlieloveriiow wall. It will be recognized thatbythe'verticaladjustment of the'gateVthe i quantity of'overflow thereoverwill bedetermined,

and a surrounding annular `canal or filter chamber 13,/ The bottom 14 oftheclarication charrl' ber slopes downwardly from the annular wall 11 toa centralv circular sump forl cavity?r 15fr The, annular wall, which.separateszthel clarification chamber'12 from the canal'll, comprises anoverf` flow wall and for this purpose it isof less height@ than theouter wall 16. n

The basin also includes inrits construction an" outlet well or upwardlyextending passage v17 and an opening 18 through the outerwall '16provides communication between the lower portion of the canal'and thelower vportionof thewfell, ysothat Jutlet Well 17 is in communication`withadis-l flow gate or Weir` 20, arrangedat theentrance to thedischarge conduit `19;- commcndsftheyncw of liquidfrom the'wellandmaintainsthe liquid n at the fjdesire'dQlevel-v within thecanal lIn'the which' iscontrolled by Ia,hand;w heel 24,1 The v s c `110 lower,en d'. of this shaft` is". connectedjwithithe l ande-26`provided'respectively in 'the inner land through the outlet well 17fordischargeoverthe layer .28,` of magnetite ork other slmila`vmatella1-.1.Awith" the/,hasn canalmeand Wenz ued :to a fpoint whereliquidvlwill 'flow' over;r the gate,r the rate fof .f the tidal movementc from 1 within :fthe pendantf'tube mayl Abe.; controlled Yby ad-ujustingl the vertical position off-"thecgategLBy properlyadjustingthefgatej,.A itis; xpossible :with thsconstruct'ion and arrangementgtosecure a smooth, even and continuous layer-like cflowof rthe'. lighterliquid andfparticles-{over the u wall t 1 1, leaving the'solid materialan'd`sludge',cwhich have a higher specific gravity than the water,substanjtially'free and ,undisturbed to 'settles upon` the bot? 29.designates in` generalan overhead kbridge basin at a suitable distanceapcvethetep there: of. bridge issupportcdat vits oppositeends uponsuitable abutments which rise from the tom-ofthe basin. 1; yz'IIln'e-r:traveling carriage orstructure 34 isfprocgv ,fvidedatitsouterl end with track wheels ,39,whichf14 turnupon a track, raillprovidedupon the' top `edge-of-fthe A,outer Wall 16r` This travelingcar-` triage supports.` for movement Awithin the canal and adjacent thetopof the filtery bed a filter bed` cleaner or machine 41. Thislcleaneris support-` having rotative't in a bearing 33 yprovidedcenture 34 issupported at or near one en'd upon/the f shaft 32 so'as to `rotate aboutsaidy-shaftzas ya cen-f,

the shaft, with thev bearing `35 turning upon the i, ,its

rrfeed from `the carriage kIY 0fsmtable" de;

" pending' beams 42 and-itconsists of a hollow #hey/mg a transverseaimensmnhwhieh isvdiebesed between but does not .contact with`v`'theinner and 'outer wens 11 yand 16.11'rne interioroftmemnk ffconstittes L a dirty iriwater chamber and leading 1 the'interiorffromrtherbottomzoff the tank,

immediately fever tnezmjegneme; 1ee111jupwerelilyrA f extending, passage(not shownlup through which j iduid will rise t`o -overilowtinto `theyinterior dirty forxthefwater'vbeing ofkrcourse athalevele'below `Ymshedwnh 1an eieetre'magpet 43.. edeptjeqj to .lil agitatinof` thernagnetlte for the releasel ik i ofthef dirtfanjdkdirtywaterthereinwhichdstul rlse into the dirty waterfchamber.l i arrange? dirty; waterisreniovedlgtrom;fthe'ch Forfthedetails ot the construction and' operationrot the magnetic ff ycleanifxvig l machine; f v.reference meyfbe had :ou.,PeitentNe. 1,'av2,'l59,`s1ay.nted (August zas-4&3 'to williamc.w1.nuh11x1r and y'Abrtthlllln lrtch:l It is;v 159D@ 90111126.01 inauch? case 1 ,equippedzwith. l h mishevd'jrwith materials 3,154, heysludge f 4hereinV ydisclosed,comprises ppositely extend "gi 4,6-V"lwhich; carryV obli'l'ely [inclined screpmeshoe Mmmm @este mmastheistructure 1:evolves.;r the-@ro iai scraped inwardly hy K i the'sump. willfbe-eng lremoved byt aj suitkblesuction,jpipe 48g,"

upithe` sludge therein-lor." jtheisuction pipe-'148.r ""'-With therotary' ktamtam; -the -settungs.upengtnelbottmref the; may be .scraped-y'into thesump kiwhiletleav- @met Struc-y ,.,1s1 :the "sume aiwhrchlettle uponi the ,i bottom ctgthe scraper *structurel* the 'levelof the surface otg the liquid passingpver'n the Iove'row liwallujv Atthe Vupwardly :extending j opening leading to-its' dirty waterchaxhher'and; @immediately overthemagnetite, thistank .is fursuitablereductiongeel mg mefeetems'erthebesm ma supstenuur yquiescent conditionVfor the readyfde'positx of filter clean" throughout ,its extent. "The"cleanerwstructure should be moved at` a ratethat win 'p1-,e ,e i t,thegfuter bed from ci's'sed Yey dnty for th'clnefthe eener the emuent'wili'be'l'f" the reduction i gearing', carries` af sprockety gear? '54whlchis connected by a sprocket chairj5^5l with A,sproket gear 56 whichis securedtoy the" axis 0i a worin-*gear 5'1. Engaged' with the'wormgear hesse@ Exemples er um f 5'1 Ialargejdrivengear Sil/which isseuredto,me1jensft-3afspeve-the bearing 31. i

. the" immergey 34 te travel the rytoprvide'ineansffor ,dependemlysi off isf taken froman i' l wthilifafre-v duction gear box5v3."j`A shaft54,4 drivembythe l y track`,'irail"42 `while itsixi'nered portionf'tums"roundltheeheftaz es a eeiiter.`tnere ismounted upon the'cariiase3,4.neartheouter end'therelof ag, D. motorfvli the drivenlshaftofwhichoperatesY1-A suitable reduction gearingy llocated within y'wref'Vduiztion Keer box 460; A shaftlrisdrivenaby"the reduction searing inbex so,"e.ndf.,tn1s-sneft is coupled 'toall will@ carries 'one of (thetrack wheels' Thlectecircult for theimoj tor 59y melqeeeeir'euw,wires-sas. sark wmen extend winced to reach inner snee untilgttheymevgeuy deposited in the `suxnpffroin which; they il 46 5 are supportedin; rinclined f relation :astobe'parall'ei o' substantiallyparallel withthe., i

i'n'clied vbottom in` yordm-r toI enableV` the j series 1a 'er sne'es te'operate' :effectively upeniztpe emerge deposited upony themelma-bottom. saideenis *46"may bey rmlysecureddn theirinclined posigfiktions byrreans for `smyrisuitable `lsystexxi i of bracebazfs' 'as 49. Y'suitable,wiege-members so jdepend y "*froln theI `beams "within thesump soy asi to :.stirr withdrawttl-kr through to andareconectedwiththe'fcollector 64,'

e1` i hlehfisreteteogby suitable reductiony between ak sprockets uponthe driven ,thcleet l divenbv www2 which is-sunably 'located yupon thecleaner; j andthe circuit wires '73" for tl1`iis2`rn'otor'.are4connected lwith eoy of the motor and a sprocket gear 81 attached to thedriving shaft for the reduction gearing. Suitable circuit wires 82, 82connect one side of the make and break switch with the wires 63, 63';while the other side of this switch is connected Ywith theelectromagnet43 by circuit wires 83, 83.

Under this arrangement, the rotary scraper structure, the travelingcarriage which moves the v f ment.ofthe invention and the abovedescription,

and while we have, in the present instance, shown and described apreferred apparatus for carrying out the invention in practice, it is tobeunderstood that the particular construction of the 'parts of theVapparatus is susceptible of modification in l various particularswithout departing from the spirit or scope of the invention orsacrificing any of its advantages.

1. Anapparatus for the clarification'of sewage liquid comprising aclarification basin having an` overflow wall, a channel receiving theliquid from the overflow wall, a filter bed with-in the channel ldividing the same into an upper cleaning chamber and a lower effluentchamber, a device within the cleaning chamber movable over the bed forcleaning the same and adapted to remove foul liquid resulting from thecleaning operation,Vr and means forming an outlet for the eiiiuentchamber. V2. An apparatus for the clarification of sewage liqudIcomprising a clarification basin, a surrounding filter chamberreceiving a layer of liquid overflow from the basin and provided with afilter bed down through which the received liquid must pass whereby tobevfiltered, an uprightl passage in communicationwith the chamberYbelowrthe.

filter bed, and means controlling the discharge of liquid from thepassage, said means being effectiverthrough the control of the dischargeto control'the fiow of liquid through the chamber and ypassage for theregulation of the layer of liquid overflowing from the basin.

3.I Anapparatus for the clarification liquidhaving, in combination,4 abasin, an over# flow partition within the basin dividing the interiorthereof into a clarification chamber surrounded by a filter chamberwhich receives. the

overflow liquid from the clarification chamber, a.,y

filter bed in the filter chamber down through which the received liquidmust pass whereby to be filtered, means providing a discharge'for thefiltered liquid, a machine for cleaning the filter bed, a scraper devicefor cleaning the clarification chamber, and means supported, on thebasin for supportingand operating the rcleaning machine and the scraperdevice. f

`4. A filter system for a cla'rification'basin comprising acircumferential overflow wall for the basin and a continuous surroundingcanal having a circumferential wall higher than said overflow wall, acontinuous filter bed within the canal dividing the latter into an uppersection which receives the liquid passing over the overflow wall and alower efliuent section for receiving liquid of sewage' passingdownwardly in the canal and through the bed, mechanism travelling aroundthe basin and means within the upper section movable by said mechanism'over the bed for cleaning the bed, and means forming an outlet fortheefiluent section and effective at a discharge,l level to maintain aconstant level in the canalabove the `filter bed. I f

v5. A filter system for a clarification basin com+ prising a 'continuoussurrounding canal.r and a continuous filter bed within the ycanal at theouter side of the basin,'said basin and canal'pr'w viding for theoverflow of liquid from the former into the latter and said filter bedbeing at a level below the level of liquid overflow from the basin intothe canal, means forming an outlet forr the filtered liquid received inthe canall below the bed and effective torestrict the downward flow ofliquid in the canal and to 'thereby regulate the overflow from thebasin, a carriage moving around the basin and meanswithin the canalmovedby said carriage along thebedfor cleaning the bed during the filteringoperation.

A basin construction'for clarifying sewage liquid comprising aycombination clarification Ychamber and filter chamber, the latter beingcontinuously separated from the former by a partition havingA anoverflow edge, filter bed withinr the filter chamber at a level belowthe .overflow edge of said partition, and a discharge outlet for thefiltered liquid in communication at one point vwith the filter chamberbelow the filter bed.

` 7. An apparatus for the clarification of sewage'liquid'comprising,'incombinatiom a circular clariflcation basin, acircular z,filter 'chamber surrounding the basnandsepqarated therefromby a partition having Aany overflow edge, a circular filter bed withinthe filter chamber below. the level of the overflow edge, airotaryscraper device within thebasin, a traveling filter bed cleaner withinthe filter chamber, and electrically controlledmeansgfor independentlyoperating said scraper device'andsaid filterbed cleaner.` l

8. The combination with a clarification basin having 'an overflow wall,of a canal receiving the overflow from saidwall fand provided with afilter bed down'through which the liquid must pass Ato be filtered, amovable scraping device for scraping off they residuum subsiding inisaidy basin, a movable machine forcleaning said filter bed,` andmeansforl operatingsaid scraper device and cleaning machine concurrentlybut at different rates of speed.

9. Inr combination, aA circular clarification chambersurrounded' by 'afilter chamber into which a layer lof liquid flows from,.theclarification chamber, afilter bed arranged in the filter chamber, meansincluding a 'rota-l shaft and Scrapers carried thereby for scraping thebottom of the clarification chamber, a machine forcleaning the filterbed, a traveling carriage supporting said machine and turning about saidrotary shaftas' a center, means for rotating said shaft,.- and'means formoving said traveling carriage.

l0. In combination, `a circular clarification chamber surrounded.k byafilter chamber into which a layer of liquid flows from theclarification chamber, a filter bed arranged in the filter chamber,means including a rotary shaft and Scrapers carried thereby for scrapingthe botfor rotating said shaft, motor-operated means v th whichis'tohammered.,

" n WILLIAMLC. LAUGHHN ABRAHAM B iAscH. j

